Shinkawa VM-21 Series, Инструкция по эксплуатации

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Section 2 Introduction
VM-21P 3-Wire LVDT Signal Conditioner Instruction Manual
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Section 2 Introduction
2.1 Scope of application
This product is used in combination with either the VM-21G Signal Conditioner Socket, or the
VM-21H Backplane Unit (sold separately), and receives signals from a 3-WIRE LVDT SIGNAL
CONDITIONER (LVDT), and converts them to insulated 4 to 20mA DC or 1 to 5V DC.
Do not use for any other purposes.
2.2 Specifications
2.2.1 Product specifications
Power supply Measuring range Input LVDT
Full range of
input LVDT
Output Conditioner socket
1 24VDC 20 25mm S LS Series 050 50mm 1 1 to 5VDC 0 Without
2 100 to 240VAC/DC 21 50mm 100 100mm 2 4 to 20mADC 1 Include
22 75mm 150 150mm
23 100mm 200 200mm
24 150mm 250 250mm
25 200mm 300 300mm
26 250mm 350 350mm
27 300mm 400 400mm
28 350mm 450 450mm
30 400mm
31 450mm
*1 Abnormal condition
• When there is an abnormality in the LVDT or signal cable (breaking in LVDT wiring, breaking or short circuit in signal cable).
• When there is an abnormality in LVDT excitation output (oscillation has stopped).
Input LVDT LS Series
Measuring Range See Model Code above
Output (isolated) 1 to 5VDC (output resistance: 250 Ω ) or 4 to 20mADC (permissible load resistance: 600 Ω or less)
I/O Conversion Accuracy
±1% of F.S. at 25°C, ±2% of F.S. at 0 to 50°C
Deviation from an ideal linear output of voltage or current in combination with LS Series LVDT.
However, when measuring range and full range of input LVDT are the same.
Response Speed
τ
=45ms, 90% response
Polarity Can be changed by wiring
Burn-down Function
*1
Detects transducer failure and causes the 4 to 20mADC (1 to 5VDC) output to go to less than
0.8mADC (0.2VDC).
T.P. Output (test point
output for confirmation null
point) Output 0V when core position is on Null point.
Output impedance: 100
Ω
Output for LVDT Excitation Voltage: 5Vrms, Frequency: 3kHz, Max. current: 50mA, Sine wave
Supply Permissible Voltage 24VDC±10% or 85 to 264VAC/DC (50/60Hz)
Power Consumption
24VDC: 3.5W, 100-240VDC: 3.5W, 100-240VAC: 10VA
Insulation Resistance 100 M Ω minimum at 500VDC between input-output-power-GND mutually.
Withstanding Voltage
2000VAC for one minute between input-output-power-GND mutually.
(With VM-21H: 1,000VAC between output-GND.)
Operating Temperature 0 to 50°C (32 to 122°F REF.)
Relative Humidity 10 to 90%RH (no condensation)
Casing Material (color) Modified polyphenylene oxide (black)
Weight Approx. 110g (0.24lb)
CE Marking Only as for 24VDC power supply specifications.
VM-21P -
S
-
Standard